Valve air tightness testing mechanism

Abstract

The utility model relates to the technical field of valve air tightness testing, and discloses a valve air tightness testing mechanism which comprises a base and a valve seat, the top of the base is fixedly connected with a detection groove, the left side and the right side of the top of the base are fixedly connected with fixing plates, and the sides, away from each other, of the two fixing plates are fixedly connected with air cylinders. One ends of the two air cylinders are fixedly connected with inflation columns, sliding grooves are formed in the left side and the right side of the detection groove, the outer walls of the inflation columns are slidably connected to the inner walls of the sliding grooves, the rear side of the top of the base is fixedly connected with an air pump, one end of the air pump is communicated with a connecting pipe, and the other end of the connecting pipe is communicated with an air tank. The left end and the right end of the gas tank communicate with second gas inlet pipes. According to the utility model, the air pump is started to input air into the valve seat through the inflation column, and when the water pump is started to inject water into the detection groove, whether bubbles appear or not can be detected by observing the water surface, thereby realizing observation and detection of the sealing performance of the valve seat.

Description

Technical Field

[0001] The utility model relates to the technical field of valve airtightness testing, in particular to an airtightness testing mechanism for a valve. Background Technique

[0002] A valve is a mechanical device used to control fluid flow and is widely used in various industrial fields such as petroleum, chemical industry, and water treatment. There are many types of valves, and common ones include gate valves, globe valves, and check valves. Globe valves are mainly used to regulate the flow rate in pipelines. They have a compact structure and convenient operation and are suitable for medium and low-pressure working conditions.

[0003] During the production of globe valves, it is necessary to strictly detect their airtightness. Airtightness detection is a key step to ensure that globe valves can be reliably sealed during actual use and prevent gas leakage. To complete this detection, special airtightness testing equipment is usually equipped on the production line.

[0004] Existing testing equipment fills compressed air with a certain pressure into the globe valve. The pressure is usually higher than the working pressure during actual use to ensure the sealing performance of the valve under extreme conditions. However, during the detection process of the valve seat by existing testing equipment, the detection link is relatively cumbersome and complex, and it is difficult to accurately judge the position of air leakage. Therefore, an airtightness testing mechanism for a valve is proposed to solve the above problems. Summary of the Utility Model

[0005] To make up for the above deficiencies, the utility model provides an airtightness testing mechanism for a valve, aiming to improve the problems that the detection link in the existing technology is relatively cumbersome and complex, and it is difficult to accurately judge the position of air leakage.

[0006] To achieve the above object, the utility model adopts the following technical solutions: An airtightness testing mechanism for a valve, comprising a base and a valve seat. A detection groove is fixedly connected to the top of the base. Fixing plates are fixedly connected to both the left and right sides of the top of the base. Cylinders are fixedly connected to the outer sides of the two fixing plates away from each other. An inflation column is fixedly connected to one end of each of the two cylinders. Sliding grooves are opened on both the left and right sides of the detection groove. The outer wall of the inflation column is slidably connected to the inner wall of the sliding groove. One end of an air pump is fixedly connected to the rear side of the top of the base and is communicated with a connecting pipe. The other end of the connecting pipe is communicated with an air tank. Second inlet pipes are communicated with both the left and right ends of the air tank. The other ends of the two second inlet pipes are communicated with second connection holes. The bottom ends of the two second connection holes are communicated with the top of the outer wall of the inflation column. Switch valves two are fixedly connected to the outer walls of the two second inlet pipes. A water pump is fixedly connected to the front side of the top of the base. A water inlet pipe is communicated with one end of the water pump. The other end of the water inlet pipe is arranged at the inner bottom of the detection groove. A sealing mechanism is arranged on the top of the base, and the sealing mechanism is used for sealing the valve seat.

[0007] As a further description of the above technical solution:

[0008] The sealing mechanism includes an inner cylinder, the outer wall of the inner cylinder is fixedly connected to the inner wall of the inflation column. An installation ring is communicated with the outer wall of the inflation column. A plurality of air outlet holes are opened on the outer wall of the installation ring. An expansion ring is fixedly connected to the outer wall of the installation ring. A first connection hole is communicated with the top of the outer wall of the inflation column. A first inlet pipe is communicated with the top end of the first connection hole. A connection tank is communicated with the outer wall of the air tank. The other ends of the two first inlet pipes are communicated with the left and right ends of the connection tank. A switch valve one is fixedly connected to the outer wall of the first inlet pipe.

[0009] As a further description of the above technical solution:

[0010] The sealing mechanism further includes a pressure detector, and the bottom of the pressure detector is communicated with the top of the outer wall of the connection tank.

[0011] As a further description of the above technical solution:

[0012] A control box is fixedly connected to the front side of the top of the base, and the control box is electrically connected to the pressure detector, the cylinder, the air pump and the water pump respectively.

[0013] As a further description of the above technical solution:

[0014] Placement plates are fixedly connected to the inner bottom of the detection groove, and rubber strips are fixedly connected to the tops of the two placement plates.

[0015] As a further description of the above technical solution:

[0016] The outer walls of the gas cylinders are fixedly connected with a plurality of reinforcing plates, and the front sides of the plurality of reinforcing plates are fixedly connected to the rear sides of the detection grooves.

[0017] As a further description of the above technical solution:

[0018] Sealing rings are fixedly connected to the inner walls of the two sliding grooves, and the outer walls of the two inflatable columns are slidably connected to the inner walls of the sealing rings.

[0019] As a further description of the above technical solution:

[0020] An observation window is fixedly connected to the front side of the detection groove, and a scale bar is provided on the front side of the observation window.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, by starting the air cylinder to drive the inflatable column to slide inwards, the two ends of the valve seat are clamped and sealed by the inflatable column. At this time, start the air pump to output gas into the air tank through the second air inlet pipe, and inject the gas into the valve seat through the air cylinder and the inflatable column. After starting the water pump to inject water into the detection groove, the tightness of the valve seat can be observed and detected by observing whether there are bubbles on the water surface.

[0023] 2. In the utility model, when sealing the valve seat, start the air pump to inject gas into the inner cylinder through the first air inlet pipe. The inner cylinder is fixedly installed in the inner wall of the inflatable column, so that the inflatable column forms a cavity sandwich layer. The gas flows through the inner cylinder and is discharged through the air outlet holes. The expansion ring can expand during the inflation process, so that the expansion ring is closely attached to the inner walls of the two ports of the valve seat, thereby providing better sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of an airtightness testing mechanism for a valve proposed by the utility model;

[0025] Figure 2 is a rear view of an airtightness testing mechanism for a valve proposed by the utility model;

[0026] Figure 3 is an exploded view of an airtightness testing mechanism for a valve proposed by the utility model;

[0027] Figure 4 is a structural schematic diagram of an airtightness testing mechanism for a valve proposed by the utility model;

[0028] Figure 5 is an exploded view of an airtightness testing mechanism for a valve proposed by the utility model.

[0029] Legend Explanation:

[0030] 1. Base; 2. Sealing mechanism; 201. Inner cylinder; 202. Mounting ring; 203. Air outlet hole; 204. Expansion ring; 205. First connection hole; 206. Connection tank; 207. Pressure detector; 208. First intake pipe; 209. First switching valve; 3. Detection groove; 4. Fixed plate; 5. Cylinder; 6. Inflatable column; 7. Sliding groove; 8. Placing plate; 9. Valve seat; 10. Air pump; 11. Connecting pipe; 12. Air tank; 13. Second intake pipe; 14. Second connection hole; 15. Second switching valve; 16. Control box; 17. Water pump; 18. Water inlet pipe; 19. Reinforcing plate; 20. Sealing ring; 21. Rubber strip; 22. Scale bar; 23. Observation window. Specific Embodiment

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Refer to Figure 1 、 Figure 3 and Figure 4, an embodiment provided by the present utility model: an airtightness testing mechanism for a valve, comprising a base 1 and a valve seat 9. A detection groove 3 is fixedly connected to the top of the base 1. Fixing plates 4 are fixedly connected to both the left and right sides of the top of the base 1. Air cylinders 5 are fixedly connected to the outer sides of the two fixing plates 4 away from each other. One end of each of the two air cylinders 5 is fixedly connected to an inflation column 6. Sliding grooves 7 are formed on both the left and right sides of the detection groove 3. The outer wall of the inflation column 6 is slidably connected to the inner wall of the sliding groove 7. The rear side of the top of the base 1 is fixedly connected to one end of an air pump 10, which is communicated with a connecting pipe 11. The other end of the connecting pipe 11 is communicated with an air tank 12. The left and right ends of the air tank 12 are each communicated with a second intake pipe 13. The other ends of the two second intake pipes 13 are each communicated with a second connecting hole 14. The bottom ends of the two second connecting holes 14 are each communicated with the top of the outer wall of the inflation column 6. A second switch valve 15 is fixedly connected to the outer wall of each of the two second intake pipes 13. A water pump 17 is fixedly connected to the front side of the top of the base 1. One end of the water pump 17 is communicated with a water inlet pipe 18. The other end of the water inlet pipe 18 is arranged at the inner bottom of the detection groove 3. A sealing mechanism 2 is arranged on the top of the base 1. The sealing mechanism 2 is used for sealing the valve seat 9. Placing plates 8 are fixedly connected to the inner bottom of the detection groove 3. Rubber strips 21 are fixedly connected to the tops of the two placing plates 8. A plurality of reinforcing plates 19 are fixedly connected to the outer wall of the air tank 12. The front sides of the plurality of reinforcing plates 19 are fixedly connected to the rear side of the detection groove 3. Sealing rings 20 are fixedly connected to the inner walls of the two sliding grooves 7. The outer walls of the two inflation columns 6 are slidably connected to the inner walls of the sealing rings 20;

[0033] Specifically, a detection groove 3 is fixedly installed on the top of the base 1. At the same time, fixing plates 4 are respectively fixed on the left and right sides of the top of the base 1. Cylinders 5 are respectively fixed on the opposite sides of the fixing plates 4. The model of the cylinder 5 is SMC CJ2. One end of each cylinder 5 is fixed with an inflatable column 6. Sliding grooves 7 are respectively opened on the left and right sides of the detection groove 3. The outer wall of the inflatable column 6 slides on the inner wall of the sliding groove 7. By starting the cylinder 5 to drive the inflatable column 6 to slide inward, the two ends of the valve seat 9 are clamped and sealed by the inflatable column 6. At this time, an air pump 10 is installed at the rear side of the base 1. One end of the air pump 10 is connected to an air tank 12 through a connecting pipe 11. The left and right ends of the air tank 12 are respectively communicated with second inlet pipes 13. The other ends of the second inlet pipes 13 are respectively communicated with the top of the outer wall of the inflatable column 6. At the same time, a second switch valve 15 is fixedly connected to the outer wall of the second inlet pipe 13 to control the flow of gas. By starting the air pump 10, the air is output into the air tank 12 through the second inlet pipe 13, and the gas is injected into the valve seat 9 through the air tank 12 and the inflatable column 6. A water pump 17 is fixedly installed on the front side of the base 1. One end of the water pump 17 is communicated with a water inlet pipe 18. The other end of the water inlet pipe 18 is arranged at the inner bottom of the detection groove 3 to inject water into the detection groove 3. A placement plate 8 is fixedly installed inside the detection groove 3. The valve seat 9 is placed through the placement plate 8 to ensure the stability of the valve seat 9. After starting the water pump 17 to inject water into the detection groove 3, the tightness of the valve seat 9 can be observed and detected by observing whether there are bubbles on the water surface.

[0034] Refer to Figure 1 , Figure 2 and Figure 5 , the sealing mechanism 2 includes an inner cylinder 201. The outer wall of the inner cylinder 201 is fixedly connected to the inner wall of the inflatable column 6. The outer wall of the inflatable column 6 is communicated with a mounting ring 202. A plurality of air outlet holes 203 are respectively opened on the outer wall of the mounting ring 202. An expansion ring 204 is fixedly connected to the outer wall of the mounting ring 202. The top of the outer wall of the inflatable column 6 is communicated with a first connection hole 205. The top end of the first connection hole 205 is communicated with a first inlet pipe 208. The outer wall of the air tank 12 is communicated with a connection tank 206. The other ends of the two first inlet pipes 208 are communicated with the left and right ends of the connection tank 206. A first switch valve 209 is fixedly connected to the outer wall of the first inlet pipe 208. The sealing mechanism 2 further includes a pressure detector 207. The bottom of the pressure detector 207 is communicated with the top of the outer wall of the connection tank 206.

[0035] Specifically, the inner cylinder 201 is fixedly installed in the inner wall of the inflatable column 6, forming a cavity sandwich layer in the inflatable column 6; the outer wall of the inflatable column 6 is connected to the mounting ring 202, and a plurality of air outlet holes 203 are evenly opened on the outer wall of the mounting ring 202. The air outlet holes 203 facilitate the smooth discharge of gas. At the same time, an expansion ring 204 is fixedly installed on the outer wall of the mounting ring 202. The expansion ring 204 can expand during the inflation process, making the expansion ring 204 closely adhere to the inner walls of the two ports of the valve seat 9, thereby providing better sealing performance; a connection hole 205 is provided at the top of the outer wall of the inflatable column 6, and the top of the connection hole 205 is connected to the first inlet pipe 208. The first inlet pipe 208 facilitates the introduction of gas from the outside, ensuring the normal operation of the inflatable column 6. The outer wall of the gas cylinder 12 is also connected to a connection tank 206. The function of the connection tank 206 is to serve as a gas transfer station to ensure that gas can be evenly distributed to each part that needs to be inflated; in order to achieve precise control of the gas flow rate, the other ends of the two first inlet pipes 208 are respectively connected to the left and right ends of the connection tank 206; a switching valve 209 is fixedly connected to the outer wall of the first inlet pipe 208. The function of the switching valve 209 is to control the inflow and outflow of gas, ensuring the safety and stability of the inflation process. A pressure detector 207 is also equipped on the outer wall of the connection tank 206 to monitor the gas pressure in the system in real time and ensure its operation within a safe range.

[0036] Referring to Figure 1 , Figure 2 and Figure 4 , a control box 16 is fixedly connected to the front side of the top of the base 1. The control box 16 is electrically connected to the pressure detector 207, the air cylinder 5, the air pump 10, and the water pump 17 respectively. A viewing window 23 is fixedly connected to the front side of the detection tank 3, and a scale bar 22 is provided on the front side of the viewing window 23;

[0037] Specifically, a control box 16 is installed on the front side of the top of the base 1. The control box 16 is electrically connected to the pressure detector 207, the air cylinder 5, the air pump 10, and the water pump 17 by wires, enabling the components to receive instructions issued by the control box 16 and perform corresponding operations. A viewing window 23 is installed on the front side of the detection tank 3. The viewing window 23 not only facilitates the user to directly observe the situation inside the detection tank 3, but also has a scale bar 22 opened on its front side. The scale bar 22 provides a capacity reference for the user, enabling the user to more accurately understand the situation inside the detection tank 3, thereby better performing relevant operations and adjustments.

[0038] Working principle: First, place the valve seat 9 on the placement plate 8 in the detection groove 3. Place the valve seat 9 through the placement plate 8 to ensure the stability of the valve seat 9. Drive the inflation column 6 to slide inward by starting the cylinder 5, so as to clamp and seal both ends of the valve seat 9 through the inflation column 6. At this time, start the air pump 10 to output gas into the air storage tank 12 through the second air inlet pipe 13, and inject the gas into the valve seat 9 through the inflation column 6 by the air storage tank 12. After starting the water pump 17 to inject water into the detection groove 3, the tightness of the valve seat 9 can be observed and detected by observing whether there are bubbles on the water surface.

[0039] And when sealing the valve seat 9, open the first switch valve 209, start the air pump 10 to inject gas into the inner cylinder 201 through the first air inlet pipe 208. The inner cylinder 201 is fixedly installed in the inner wall of the inflation column 6, so that the inflation column 6 forms a cavity sandwich layer. The gas flows through the inner cylinder 201 and is discharged through the air outlet holes 203. The expansion ring 204 can expand during the inflation process, so that the expansion ring 204 is in close contact with the inner walls of the two ports of the valve seat 9, thereby providing better sealing performance and ensuring the normal operation of the inflation column 6.

[0040] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An airtightness testing mechanism for a valve, comprising a base (1) and a valve seat (9), characterized in that: The top of the base (1) is fixedly connected with a detection groove (3). On the left and right sides of the top of the base (1), fixing plates (4) are fixedly connected. On the far sides of the two fixing plates (4), cylinders (5) are fixedly connected. One end of each of the two cylinders (5) is fixedly connected with an inflatable column (6). On the left and right sides of the detection groove (3), sliding grooves (7) are opened. The outer wall of the inflatable column (6) is slidably connected to the inner wall of the sliding groove (7). At the rear side of the top of the base (1), one end of an air pump (10) is fixedly connected, and a connecting pipe (11) is communicated. The other end of the connecting pipe (11) is communicated with an air tank (12). The left and right ends of the air tank (12) are both communicated with second inlet pipes (13). The other ends of the two second inlet pipes (13) are both communicated with second connection holes (14). The bottom ends of the two second connection holes (14) are both communicated to the top of the outer wall of the inflatable column (6). The outer walls of the two second inlet pipes (13) are fixedly connected with second switch valves (15). At the front side of the top of the base (1), a water pump (17) is fixedly connected. One end of the water pump (17) is communicated with a water inlet pipe (18). The other end of the water inlet pipe (18) is arranged at the inner bottom of the detection groove (3). A sealing mechanism (2) is arranged on the top of the base (1), and the sealing mechanism (2) is used for sealing the valve seat (9).

2. The airtightness testing mechanism of a valve according to claim 1, characterized in that: The sealing mechanism (2) includes an inner cylinder (201). The outer wall of the inner cylinder (201) is fixedly connected to the inner wall of the inflatable column (6). The outer wall of the inflatable column (6) is communicated with a mounting ring (202). A plurality of air outlet holes (203) are opened on the outer wall of the mounting ring (202). An expansion ring (204) is fixedly connected to the outer wall of the mounting ring (202). The top of the outer wall of the inflatable column (6) is communicated with a first connection hole (205). The top end of the first connection hole (205) is communicated with a first inlet pipe (208). The outer wall of the air tank (12) is communicated with a connecting tank (206). The other ends of the two first inlet pipes (208) are communicated with the left and right ends of the connecting tank (206). The outer wall of the first inlet pipe (208) is fixedly connected with a first switch valve (209).

3. The airtightness testing mechanism of a valve according to claim 2, characterized in that: The sealing mechanism (2) further includes a pressure detector (207). The bottom of the pressure detector (207) is communicated with the top of the outer wall of the connecting tank (206).

4. An airtightness testing mechanism for a valve according to claim 1, characterized in that: At the front side of the top of the base (1), a control box (16) is fixedly connected. The control box (16) is electrically connected to the pressure detector (207), the cylinder (5), the air pump (10), and the water pump (17) respectively.

5. The airtightness test mechanism of a valve according to claim 1, characterized in that: At the inner bottom of the detection groove (3), placing plates (8) are fixedly connected. On the top of the two placing plates (8), rubber strips (21) are fixedly connected.

6. The airtightness testing mechanism of a valve according to claim 1, characterized in that: A plurality of reinforcing plates (19) are fixedly connected to the outer wall of the air tank (12). The front sides of the plurality of reinforcing plates (19) are fixedly connected to the rear side of the detection groove (3).

7. The airtightness testing mechanism of a valve according to claim 1, characterized in that: Sealing rings (20) are fixedly connected to the inner walls of the two sliding grooves (7). The outer walls of the two inflatable columns (6) are slidably connected to the inner walls of the sealing rings (20).

8. The airtightness testing mechanism of a valve according to claim 1, characterized in that: A viewing window (23) is fixedly connected to the front side of the detection groove (3), and a scale bar (22) is provided on the front side of the viewing window (23).

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